Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:03 2012

Optimize a model with 142 rows, 80 columns and 284 nonzeros
Presolve removed 68 rows and 32 columns
Presolve time: 0.00s
Presolved: 74 rows, 48 columns, 151 nonzeros
Variable types: 0 continuous, 48 integer (48 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 3.900000e+01, 56 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   39.00000    0   40   36.00000   39.00000  8.33%     -    0s
     0     0   38.16667    0   47   36.00000   38.16667  6.02%     -    0s
H    0     0                      37.0000000   38.16667  3.15%     -    0s
H    0     0                      38.0000000   38.16667  0.44%     -    0s

Cutting planes:
  Zero half: 4

Explored 0 nodes (103 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0%